Vibroisolator



April 5, 1w

S. ROSENZWEIG VIBROISOLATOR Filed Dec. 18, 1945 Patented Apr. 5, 1949 VIBROISOLATOR Siegfried Rosenau/eig, New York, N. Y.

Application December 18, 1945, Serial No. 635,638r

(Cl. 248--2l) 3 Claims.

This invention relates to isolators or vibration dampers of the type used between the base of various types of machinery and the floor or subbase to prevent the transmission of vibration from the machine through the door or, vice versa.

A primary object of the invention is to provide a novel structure which effectively absorbs vibration in a vertical direction as well as resisting shocks in a horizontal direction to prevent lateral or sidewise movement between the supported machine and the floor or base. In that connection a distinctive feature of the invention resides in providing means for adjustably placing the isolation means which resists sidewise movement under compression in the respect that `the mere the necessity of dismantling the entire structure.

Thus, the present invention makes it possible to effect the desired adjustment of parts in a simple and expeditious manner.

A further object of the invention is to provide simple. and practical means for confining the isolation elements and also effecting uniform compression of adjacent pairs thereof by adjusting one of the confining Walls by the accessible nut means above referred to.

With the above and other objects in View which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

A practical embodiment of the invention is shown in the accompanying drawings, in which:

Figure 1 is a horizontal sectional View of the improved construction taken on the line l-l of Figure 3.

Figure 2 is a vertical sectional view taken on the line 2 2 of Figure 3.

Figure 3 is an end elevation of the construction shown in Figures 1 and 2.

Similar reference characters designate correspending parts throughout the several figures of the drawings.

According to the embodiment illustrated, the invention includes a bottom member A and a top member B vertically spaced apart by a series of springs S. These springs have their lower ends resting on the bottom member A while their upper ends are engaged by a compression yoke plate D having a series of cups for receiving the upper ends of the springs. The said plate D is adjust- Cil 2 able relative to the base by threaded bolt E which forms a part of the means for anchorthe machinmy base to the top member. The arrangement is more or less conventional and is .simply recited by way of explanation of the general type of damper.

Referring more particularly to the novel features of the present invention, it will be observed that the bottom member A is provided with side walls l which have integrally formed therewith the inturncd walls 2. These end walls are relatively short in the sense that they only extend inwardly toward each other for a part of the width of the base member thereby to provide a space or clearance to expose the abutment walls 3 carried by the top member B and depending therefrom. Before proceeding to a further description of the abutment walls, may be pointed out that the angular relation of the side walls l and end Walls provides isolation seats. as will hereinafter more fully appear. in other words, the angular relationship of the walls l and E provides inwardly facing isolation material receiving seats at all four corners of the substantially rectangular bottom member A.

The abutment walls 3, which depend from the top member B, include a web portion provided with an opening Il while the edges thereof are formed with the outwardly directed wings or iianges 5. The abutment walls 3 cooperate with a compression plate 6 which is of greater width than the width of the abutment members as will be apparent from Figure l. These compression plates are provided with a threaded stud l which passes through the opening l in the web of the abutment wall to receive an adjusting nut and a lock nut combination designated generally as 3.

The isolation seats dened by the angular relation of the walls l and 2, the wings 5 of the abutment walls, and the outer portions of the compression plate 5, form in effect, a pocket for receiving the isolation blocks I0. These blocks are vertically elongated and extend in height from the upper portion of the bottom member A to a point just short of the top member B, thereby to provide sufficient space to enable the spring elements S to function effectively as the bottom member A and the top member B move relative to each other under vibration manifested in a vertical direction. These isolation blocks may be of cork, rubber, or any other non-metallic material. Preferably, however, cork is used.

In the arrangement described, it will be apparent that when the isolation blocks Il) are placed as shown in the drawing, the outer portion of the compression plate 6 may be moved outwardly by manipulating the nut arrangement 8 on the threaded stud 1.

By turning the nuts home, the compression plates place the isolation blocks under more or less compression causing them to completely ll out the area dened by the angular relation of the walls I and 2, Wings and the outer portions of the plates 6. Depending on the degree of tension placed on the stud 1, the isolation blocks may be made soft or hard to suit varying degrees of fatigue in the blocks and other conditions in different installations. It will be apparent that since the nut combination 8 is readily accessible at the ends of the unit, adjustment may be easily effected. Also, the arrangement of the isolation blocks relative to the entire assembly eiectively resists side thrust at an angle to the Vertical while permitting the springs S to function in their normal manner.

Without further description, it is believed that the advantages of the invention will be readily apparent, and it will of course be understood that changes in the form, proportions, and details of construction may be resorted to within the scope of the appended claims.

I claim:

1. A vibration damper comprising, a substantially rectangular bottom member having inwardly facing isolation member receiving seats at opposite ends thereof, a top member having depending abutment walls each including a perforated Web and angular wing portions, plates of greater width than the webs of the related abutment walls and each having a threaded stud passing through the perforated webs to receive clamping and adjusting nut means, and isolation blocks coniined between adjacent faces of the said seats, abutment Walls and wing portions of the plates.

2. A vibration damper, comprising a substantially rectangular bottom member having upstanding side walls and inturned end walls forming inwardly facing angular isolation material receiving seats at all four corners of the area dened by the side and end walls, said end walls terminating inwardly of the side walls to provide a clearance between the inner edges, a substantially rectangular top member having dependent abutment walls inwardly of the ends thereof, said abutment Walls including a web formed with an opening and having outwardly extending right angularly disposed wing portions at opposite sides thereof, said abutment Walls being of less width than said clearance, an adjustable compression plate for each depending abutment wall, said plate being of greater width than the adjacent abutment wall and having a threaded stud adapted to pass through the opening in said wall to receive a clamping nut, and blocks of isolation material conned in the space between the outer ends of the said plate, the wing portions of the abutment walls and said seats, whereby, upon manipulating the clamping nut, said isolation blocks may be adjustably placed under compression.

3. A vibration ydamper comprising Substantially rectangular top and bottom members, one of said members having inwardly facing isolation member receiving seats at opposite ends thereof, abutment Walls carried by one of said members, each of said walls having an opening and outturned wings at the opposite sides thereof, plates at the inner faces of the abutment Walls and of greater width than said faces, said plates having threaded studs passing through said openings and receiving adjustment nuts for drawing the plates to the abutment walls, and isolation blocks conined between adjacent faces of said seats, plates and wings.

SIEGFRIED ROSENZWEIG.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,189,708 Coyne Feb. 6, 1940 2,359,941 Rosenzweig 1 Oct. 10, 1944 

